Sand-blast apparatus.



' Taall #may concern.' .lle it yknownl that I, 'FOSTER J. HULL, a v citizen of the Unitedv States, and aresidenttesi' .immane corr t.) .NTED STATES roeren. 1. HULL, or BRooKiLrN. New

ASSIG--R TO THOlE-AS W. PANGBORN COMPANY. O'E JERSEY CITY. NEW' JERSEY. A UORORATION 0F NEW YORK.

SAND-BLAST APPARATUS.

'Leiterin' Specification of Letters Patent.

' Patented Mal'. 4, 1913.

lApplication. filed April 30, 1912. Serial No. 694,238.

Aof Brooklyngginthe county of Kings. and

' Sta-te of New York, hgve-'invented certain newand useful... Improyements in Sand- Blast Apparatus, of Whichthe following is a specifica tion.

My invention relates proved4 sand-.container and yimproved sandand-airfi`mixing "means, together with an improved fvalvje 'controlling the delivery of the sandif 'f v"he'lcontainen The ol .s' f'iny invention are to iniprove "am ll s. provideimproved"and ,eil'ective means for regulatingk the' action of such apparatus, :nd toso'const-ruct the sand-delivery Valve 'if the' apparatus that the, portion thereof subject to material .Wearniay be renewed readily. g,

jvfih now fion with re rence to the accompanying drawing'and will then point .out the-novel :features in. clain'jisf.J 4 l In thedrawings Figure 1 shows y21V-central Vertical section of the apparatus constructed in iaccordanee, with .my invention. I Fig. 2 shores a' transverse section through the'valve 81361711 atthefpoiiit.of'engagenient thereof by they 've rod. Fig. Sis a detail central veriieaisection,' onfla.larger scale, of the valve ett-he bottom of the pressure tank, and asso-` oiated p= r-its;`,l `ig. f4 is a detail side elevatioifrotf thi-latch mechanism for the handle i bnfi Eph".

uch latch mechanism. l

said drawing. V1 designates a pressure muli adapted, to contain sand o1" other abra- 4 sive material, and 'having an outlet at 2 for the sanfl,which loutlet is guarded by a suitable screen designates an air tube extending downwardly through this container 1, and connected at the lower end to a vvalve-erising" 5, within which is a hollow Y Valve-spindle 6 provided in its side with a port V7 through' which air under pressure may pass @from the interior of valve body 5 ihtot-he borefSof the valve'spindle. The

tube 4i connected at its upper end to a fhollow'bonnet Sinto which air under pressure is'delivered by a suitable valved pipe- 10Q-s nchairl'ieing taken from a compressed airptafnklll orlother suitable source ot' supto improvements in sand"b1ast apparatus, and comprises an nnplify--ksand blast. appaimtus. to

pr'oceedy t describe 'my innen# .'5 is a detail -liorizmital section' ply. There is also a valx'ed connection 12 from this pipe lOyto the upper portion of container 1. Beneath the discharge outlet of container l there is a mixing chamber 13, to the outer end of which rent of sand-laden air to' the point of use.4

lVithin the central air tube 4 of container 1 there a rod 15, usually of square or other polygonal cross section, which rod is seated vat its lower end in a socketl of corresponding .t'orln inthe top ofY the valve spindle @this rod l5 serving as means for rotating the valve spindle. Said rod 15 'passes through a suitable stulling box atthe upper end ot' the bonnet 9 and is there provided with a. handle 1G whereby said rod nay be turned to etlect rotation of the valve spindlef. This handle 16 is provided with va spring-actuated latching dog 16a engaging notchesina rack lll ofthe bonnet 9. I

The valve bonnet 5 has at its lower end a flanged portion 17 in which is a discharge port -18 registering with discharge opening y of container 1; an lwithin said flanged portion 1T of the 'valve bonnet there is a removable valve seat *19V tlanged portion 17 'bys ible means. as for example screws 20. This valve seat 1S) has in it a port 21 4which 'regis ers 'with the dis; charge opening 18 above yiieiitioned.

keyed to the valve stem (3 by a key 22a so as to be rotated thereby when the valve stem is tnrning.- the purpose being to bring the valve opening 23 of the valvedsk into more or less'cmnplete registry -iviththe valve ports A21 and 18 thereabove, in order 4tovary the delivery ot' the sand, or to stop it altogether. Spring 2l within the valve-bonnet through the valve to the `borefff'tih'e mixingchamber 13, where it!v Willfencounter air may be connect-ed a hose 1li for carrying away the cur- `tse'cured to the The valve stem 6 carriesa valve disk 22.

5 holds the valve fsk 22 against the relnovpass frdm the interior'2"'pfybcontainer-.41:-

under 'pressure passing downward through.

air. tube Lland hollow valve spindle V6, the

air and sand thus mixed passing'outward through the ho'sef'l/l. What Ii claim iszv Y '/LSand blast apparatusicomprising .in-

combinationa pressure tankadapted to conf`- tain granular abrasive -I nafterial,lv and h av-r ing a downwardly directed discharge openf ing vat*it`s"bottom, an air pipe extending from the ytop ofthe tank downward into v proximity tosaid discharge opening, ajhol.-

j low valve casing' secured to said air pipe, a3 movable valvel member carriedby said cas-2 ing and movable-'transversely .across 'said discharge--` opening, for regulating flow v through said. opening, said valve member having' a downwardlydirectedf port, Iineans located within said -ai'rl v'pipe and valve cas- 'other elastic fluid `to' the lupper portion of said lpressu'rejtank and to, saidair pipe.

'2'. v Sand 'blast apparatus gcompri'singfin f -25 4coinbinatioi'i a pressuretank adapted to contain` granularl abrasive' Imaterial, and having a downwardly directed discharge opening at A ing for operating Said Valve memben. and means 'for .Suppli'illgscompressed air or its bottom',a'n"air pipeextending from" the' top of the tank downward into proximity to said discharge opening,l ahollowvalve cas-v l ing-secured 'to saidair kpipe and `forming a downward extension thereof, andl projecting through saidy discharge opening, therebeingdischarge'space around said valve casing, 'a

` movable valve member'carried by saidcasing and movable 'transversely'across such discharge opening, and regulating low through said opening, saidvalve member having'a downwardly directed port, means 4o located '.within 'said air pipeA and valve casing for operating said valve` member, and

v means for supplying compressed air or other elasticv Huid tothe upper portion offsaid pressure tank and to said air pipe, said' valve ,memberfprovided withV a passage for the 'casing into the space beneath'-the valve.

3; Sandblast apparatus'comprising coiiibination'apressure tank adapted to con- 'tain'granular abrasive material, `and' having a downwardly'direct'ed dischargeopening at its bottom', an lair pipe extending fromtlie top of the 'tankdownward into proximity to said discharge opening, Va hollow valve casdownwardexteiisionthereof, and projecting ing, secured tosaidairpipeiand form'ingra* through discharge opening' there being? ve casing, nf'im'fable"'in ilve'*member'carriedy by said cas-x ing .and-'movable transverselyy vacross such discharge `opening,andj yregulating flow througl i" said opening, said valye member ,having'adownwardly directed port,`means located within saidair pipe and valve casing .65 for operating said valve member, and means for supplying 'coiiipressed'air or. other tieii'uid 'toi the vupper*portieri of said pres;

sure tanl';l and to said air pipe, Asaid vlve ".inember'rprovided: with a passagefior"y the' vi'lowV of 'air from tli`e\" interior of saidvIaLl-veiyo 'casinginto -the space beneath the valve, and" mixing chamber` beneath. said; 'discharge outlet aiid'valve-.a'nd in" which abrasive' material andair:passingthroughsaid'valve` ompn'smg 4combinationa pressure'tank-adapted.:tol-con: tain granular .abrasivefmateriah and'havng a `downwardly directed vdischarge' opening' at.V l

its .lower fend, a vialve rcasing located iii'party` within thetank and'havirglaiang'ed and por-ted ,seat portionA 'extending'4 across such,v disch-arge opening, a j ported "alve" disk rol tatably n'iouted` adj acentth fs''at' portion, 'j and means for'rotating said disk. i j i351 5.,-Sai'id blast Q apparatus comprising-in'.

combination a pressure tankjadapted to `conf i tain granular abrasive n laterial,l and having 1 jacent'the surface ofsaid seat-, .fnd l'nean'sy foi1 rotating. said valve disk.

' 6. Sand `blast apparatuscomprising combination 'a'pressure tank' adapted to conaou tain granular abrasive` materia-1, 'and l`having' ,a downwardly directed dischargeoening at; npart ported fseatl portion.ex'teiidiiig" across si1ch'1() 54 discharge opening, a? portedfvalve `1' tatablymounted` adjacent, the seat portion,

and means for rotatingsaid-disk, and means for holding such valvedisk-against itsjseat. 7. Sand blast' apparatus comprising H0 'combination a pressure ta-nkadaptedto conl tain granular abrasive material, and having i-` a' downwardly directed discharge opening at y its lower end,- af hollow valve casing located -inf part within the tank and having '8i-115- iangedjand' ported seat portion -extendmg across such discharge opening, a ported valve' disk"rotatablymounted adjacent the seatportion, afvalve spindle secured tosaid disk; and located-within 'said valve. cas1ng,ga .120

springfwithin the valve 'casing acting against.l suchfspindle and tending tohold said valve-f diskagainst. its seat, and means engagin`g V said'spindle for rotating said valve disk; '1

' 8. Sand @blast` apparatus compri combination a. pressure tank adapted tovco'ntain lgranular abrasive material, `and havinga downwardly directed dischargeopening at its lower end, a hollow vvalve casing located vin part within the tankand having ailanged. 13 0 ngd as portion, a valve diskrotatablymounted' ad# sing wen/5 A und ported seat portion extending acx'oss eue-11 disdain-ge opening, aported fv'alvemdsk l'uumbly mounted adjacent the seat portion, u valvespindle ,s ecured'fo Said disk and iQ- czated Within said valve casing, a sp1-ing Within the valve easing acng a-ginst such spindle and tending to hold said -V'ave ds'k against its seat, an ail' pipe connected to the valve' casing and extending upwafrdly through ead 'tank,'means for compressed air o1' other elastic fluid under pressure to said air pipe and to the upper'.

meeting vlie' bg ing Witnesses.

supplying l FOSTER J. Hmm Witnesses H; Mgm, D. A DAVIES. v 

